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CHARLES V. RILEY and L. O. HOWARD.  Some of the bred parasitic Hymenoptera in the National Collection.

Insect Life, III, Nos. 11 and 12, August, 1891, pp. 460-464.

Systematic enumeration of the rearings of North American parasitic Hymenoptera of the families Ichneumonidae (sub families Tryphoninae, [[strikethrough]] and [[/strikethrough]] Pimplinae and Trigonalidae).  Continued from Insect Life, III, No. 4, November, 1890, p. 158.